<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
  <el-header>
      <div>
         <img src="../assets/heima.png" alt=""> 
         <span>电商后台管理系统</span>
      </div>
       <el-button type="info" @click="logout">退出</el-button></el-header>
 <!-- 页面主体区 -->
  <el-container>
      <!-- 侧边栏 -->
    <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
         <el-menu
      background-color="#545c64"
      text-color="#fff"
      active-text-color="#409eff" unique-opened :collapse="isCollapse"
      :collapse-transition="false" :router="true" :default-active='activePath'>
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
          <!-- 一级菜单模板区 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
          <el-menu-item :index="'/'+subItem.path " v-for="subItem in item.children" :key="subItem.id"
          @click="saveNavState('/' +subItem.path)">
               <template slot="title">
            <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
          </el-menu-item>
      </el-submenu>
     
    </el-menu>
    </el-aside>
    <!--aside 右侧内容主体 -->
    <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
    data(){
        return{
            //左侧菜单数据
            menulist:[],
            iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      //是否折叠
      isCollapse:false,
      //被激活的链接地址
        activePath:''
        }
        
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods:{
        logout(){
            window.sessionStorage.clear();
            this.$router.push("/login");
        },
        //获取所有的菜单
        async getMenuList(){
            const {data:res}=await this.$http.get('menus')
            if(res.meta.status!==200) return this.$message.error(res.meta.msg)
            this.menulist=res.data
            console.log(res);
        },
//点击按钮，切换菜单的折叠与展开
        toggleCollapse(){
            this.isCollapse=!this.isCollapse
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
        }
    }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color:#373d41 ;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
background-color: #333744;
.el-menu{
    border-right: none;
}
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color:#4a5064 ;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;

}
</style>